Maybe, but you'd think that they might have heard of it!
Who did you ask? I've popped into the Cheadle store a couple of times recently to ask about availability, and they've known exactly what model I've been referring to.
They reckon should get the Air in stock at the same time as Apple stores, although I'm guessing that they mean "when it's widely available in Apple stores", as opposed to 10 or 12 units here or there.
They also had the 1.6 HDD unit on their system but not the 1.8 SSD, and the guy I spoke to suspected that they wouldn't be selling the latter at all.